<!DOCTYPE html>
<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html;charset=utf-8"/>
    <link type="text/css" rel="stylesheet" href="style.css"/>
  </head>
  <body>
    <h2>
      Flare imports<br>
      hierarchical edge bundling
    </h2>
    <div style="position:absolute;bottom:0;font-size:18px;">tension: <input style="position:relative;top:3px;" type="range" min="0" max="100" value="85"></div>
    <script type="text/javascript" src="/cmd/af"></script>
    <script type="text/javascript" src="d3.js"></script>
    <script type="text/javascript" src="d3.layout.js"></script>
    <script type="text/javascript" src="packages.js"></script>
    <script type="text/javascript">

var w = 1280,
    h = 800,
    rx = w / 2,
    ry = h / 2,
    m0,
    rotate = 0;

var splines = [];

var cluster = d3.layout.cluster()
    .size([360, ry - 120])
    .sort(function(a, b) { return d3.ascending(a.key, b.key); });

var bundle = d3.layout.bundle();

var line = d3.svg.line.radial()
    .interpolate("bundle")
    .tension(.85)
    .radius(function(d) { return d.y; })
    .angle(function(d) { return d.x / 180 * Math.PI; });

// Chrome 15 bug: <http://code.google.com/p/chromium/issues/detail?id=98951>
var div = d3.select("body").insert("div", "h2")
    .style("top", "-80px")
    .style("left", "-160px")
    .style("width", w + "px")
    .style("height", w + "px")
    .style("position", "absolute");

var svg = div.append("svg:svg")
    .attr("width", w)
    .attr("height", w)
  .append("svg:g")
    .attr("transform", "translate(" + rx + "," + ry + ")");

svg.append("svg:path")
    .attr("class", "arc")
    .attr("d", d3.svg.arc().outerRadius(ry - 120).innerRadius(0).startAngle(0).endAngle(2 * Math.PI))
    .on("mousedown", mousedown);

//d3.json("flare-imports.json", function(classes) {
d3.json("/cmd/agcj", function(classes) {
  var nodes = cluster.nodes(packages.root(classes)),
      links = packages.imports(nodes),
      splines = bundle(links);

  var path = svg.selectAll("path.link")
      .data(links)
    .enter().append("svg:path")
      .attr("class", function(d) { return "link source-" + d.source.key + " target-" + d.target.key; })
      .attr("d", function(d, i) { return line(splines[i]); });

  svg.selectAll("g.node")
      .data(nodes.filter(function(n) { return !n.children; }))
    .enter().append("svg:g")
      .attr("class", "node")
      .attr("id", function(d) { return "node-" + d.key; })
      .attr("transform", function(d) { return "rotate(" + (d.x - 90) + ")translate(" + d.y + ")"; })
    .append("svg:text")
      .attr("dx", function(d) { return d.x < 180 ? 8 : -8; })
      .attr("dy", ".31em")
      .attr("text-anchor", function(d) { return d.x < 180 ? "start" : "end"; })
      .attr("transform", function(d) { return d.x < 180 ? null : "rotate(180)"; })
      .text(function(d) { return d.key; })
      .on("mouseover", mouseover)
      .on("mouseout", mouseout);

  d3.select("input[type=range]").on("change", function() {
    line.tension(this.value / 100);
    path.attr("d", function(d, i) { return line(splines[i]); });
  });
});

d3.select(window)
    .on("mousemove", mousemove)
    .on("mouseup", mouseup);

function mouse(e) {
  return [e.pageX - rx, e.pageY - ry];
}

function mousedown() {
  m0 = mouse(d3.event);
  d3.event.preventDefault();
}

function mousemove() {
  if (m0) {
    var m1 = mouse(d3.event),
        dm = Math.atan2(cross(m0, m1), dot(m0, m1)) * 180 / Math.PI;
    div.style("-webkit-transform", "translate3d(0," + (ry - rx) + "px,0)rotate3d(0,0,0," + dm + "deg)translate3d(0," + (rx - ry) + "px,0)");
  }
}

function mouseup() {
  if (m0) {
    var m1 = mouse(d3.event),
        dm = Math.atan2(cross(m0, m1), dot(m0, m1)) * 180 / Math.PI;

    rotate += dm;
    if (rotate > 360) rotate -= 360;
    else if (rotate < 0) rotate += 360;
    m0 = null;

    div.style("-webkit-transform", "rotate3d(0,0,0,0deg)");

    svg
        .attr("transform", "translate(" + rx + "," + ry + ")rotate(" + rotate + ")")
      .selectAll("g.node text")
        .attr("dx", function(d) { return (d.x + rotate) % 360 < 180 ? 8 : -8; })
        .attr("text-anchor", function(d) { return (d.x + rotate) % 360 < 180 ? "start" : "end"; })
        .attr("transform", function(d) { return (d.x + rotate) % 360 < 180 ? null : "rotate(180)"; });
  }
}

function mouseover(d) {
  svg.selectAll("path.link.target-" + d.key)
      .classed("target", true)
      .each(updateNodes("source", true));

  svg.selectAll("path.link.source-" + d.key)
      .classed("source", true)
      .each(updateNodes("target", true));
}

function mouseout(d) {
  svg.selectAll("path.link.source-" + d.key)
      .classed("source", false)
      .each(updateNodes("target", false));

  svg.selectAll("path.link.target-" + d.key)
      .classed("target", false)
      .each(updateNodes("source", false));
}

function updateNodes(name, value) {
  return function(d) {
    if (value) this.parentNode.appendChild(this);
    svg.select("#node-" + d[name].key).classed(name, value);
  };
}

function cross(a, b) {
  return a[0] * b[1] - a[1] * b[0];
}

function dot(a, b) {
  return a[0] * b[0] + a[1] * b[1];
}

    </script>
  </body>
</html>
